Disposable diaper

ABSTRACT

A disposable diaper in which an absorbent body ( 7 ) is provided on a crotch part of a pants-shaped exterior member ( 2 ), wherein the absorbent body ( 7 ) is adhered to a skin-facing side of the exterior member ( 2 ) at a first adhering region ( 14 ), an inner sheet ( 5 ) and an outer sheet ( 6 ) of the exterior member ( 2 ) are adhered to each other at a second adhering region ( 16 ), the second adhering region ( 16 ) includes a second middle adhering region ( 16 M) provided at the crotch part, a second central front adhering region ( 16 CF) located anterior thereto so as to overlap with the first adhering region ( 14 ) and a second central rear adhering region ( 16 CB) located posterior thereto so as to overlap with the first adhering region ( 14 ), and second front non-adhering regions ( 17 F) are formed on both sides of the second central front adhering region ( 16 CF) in the width direction so as to overlap with the absorbent body ( 7 ) and/or second rear non-adhering regions ( 17 B) are formed on both sides of the second central rear adhering region ( 16 CB) in the width direction so as to overlap with the absorbent body ( 7 ).

TECHNICAL FIELD

The present invention relates to a pants-type disposable diaper.

BACKGROUND ART

Conventionally, disposable diapers comprising an exterior member that isformed in a pants shape and an absorbent body provided on a crotch partof the exterior member and includes a top sheet, a back sheet and anabsorber provided therebetween have been known (for example, PatentLiteratures 1 to 6). Patent Literature 6 discloses a disposable diaperin which a leg circumference elastic material is fixed between aplurality of sheets constituting the exterior member along left andright leg openings of the exterior member, wherein an adhesive isapplied to at least three block-shaped regions formed by dividing anouter periphery of each of a left leg opening forming portion and aright leg opening forming portion, and the leg circumference elasticmaterial is disposed on an application area to which the adhesive isapplied in a stretched state so as to extend along each of the left legopening forming portion and the right leg opening forming portion.

CITATION LIST Patent Literature PATENT LITERATURE 1

Japanese Unexamined Laid-open Patent Application Publication No.H08-280739

PATENT LITERATURE 2

Japanese Unexamined Laid-open Patent Application Publication No.2004-049763

PATENT LITERATURE 3

Japanese Unexamined Laid-open Patent Application Publication No.2004-298395

PATENT LITERATURE 4

Japanese Unexamined Laid-open Patent Application Publication No.2005-087622

PATENT LITERATURE 5

Japanese Unexamined Laid-open Patent Application Publication No.2014-180346

PATENT LITERATURE 6

Japanese Unexamined Laid-open Patent Application Publication No.2009-189621

SUMMARY OF INVENTION Technical Problem

Since disposable diapers are worn for a relatively long time, it isdesirable that sweat or moisture generated from a wearer is suitablydischarged to the outside of the diaper for improving wearing feeling.In particular, in a disposable diaper in which an absorbent body isprovided on a crotch part of a pants-shaped exterior member, airpermeability at a portion where the absorbent body is overlapped withthe exterior member tends to decrease. The present invention has beenmade in view of the above circumstances, and an object of the presentinvention is to provide a disposable diaper which is excellent in airpermeability.

Solution to Problem

The disposable diaper of the present invention which solves the aboveproblems is a diaper comprising: an exterior member that has a frontbody part, a rear body part and a crotch part positioned therebetweenand is formed into a pants shape having a waist opening and a pair ofleg openings by joining the front body part and the rear body part; andan absorbent body that is provided at least on the crotch part of theexterior member and includes a top sheet, a back sheet and an absorberprovided therebetween; wherein: the exterior member includes an innersheet and an outer sheet; a front leg elastic member extending acrossthe crotch part and along a front side of an edge of the leg opening anda rear leg elastic member extending across the crotch part and along arear side of the edge of the leg opening are provided between the innersheet and the outer sheet; the absorbent body is adhered to askin-facing side of the exterior member at a first adhering region; theinner sheet and the outer sheet are adhered to each other at a secondadhering region, the second adhering region includes a second middleadhering region provided at the crotch part, a second front adheringregion located anterior to the second middle adhering region and asecond rear adhering region located posterior to the second middleadhering region, and the front leg elastic member and the rear legelastic member are disposed so as to extend across the crotch part inthe second middle adhering region; the second middle adhering region isprovided so that at least a part thereof overlaps with the firstadhering region and is provided continuously from one side edge to theother side edge of the absorbent body in the width direction; and thesecond front adhering region is provided so as to satisfy the followingrequirement A and/or the second rear adhering region is provided so asto satisfy the following requirement B.

(Requirement A) The second front adhering region includes a second rightfront adhering region provided on one side in the width direction so asnot to overlap with the first adhering region, a second left frontadhering region provided on the other side in the width direction so asnot to overlap with the first adhering region, and a second centralfront adhering region provided therebetween so as to overlap with thefirst adhering region; and second front non-adhering regions in whichthe inner sheet and the outer sheet are not adhered to each other areformed between the second right front adhering region and the secondcentral front adhering region and between the second left front adheringregion and the second central front adhering region so as to overlapwith the absorbent body.

(Requirement B) The second rear adhering region includes a second rightrear adhering region provided on one side in the width direction so asnot to overlap with the first adhering region, a second left rearadhering region provided on the other side in the width direction so asnot to overlap with the first adhering region, and a second central rearadhering region provided therebetween so as to overlap with the firstadhering region; and second rear non-adhering regions in which the innersheet and the outer sheet are not adhered to each other are formedbetween the second right rear adhering region and the second centralrear adhering region and between the second left rear adhering regionand the second central rear adhering region so as to overlap with theabsorbent body.

In the disposable diaper of the present invention, the absorbent body isadhered to a skin-facing side of the exterior member at the firstadhering region, and at a portion which the first adhering region isoverlapped with, the inner sheet and the outer sheet of the exteriormember are adhered to each other at the second central front adheringregion and/or the second central rear adhering region and further at thesecond middle adhering region provided therebetween. And on the bothsides, with respect to the width direction, of the second central frontadhering region and/or the second central rear adhering region, thesecond front non-adhering region and/or the second rear non-adheringregion in which the inner sheet and the outer sheet are not adhered toeach other are formed so as to overlap with absorbent body. Therefore,air permeability of the exterior member is increased due to the secondfront non-adhering region and/or the second rear non-adhering region,and sweat or moisture generated from a wearer is easily discharged tothe outside of the diaper. Meanwhile, since the second middle adheringregion is provided continuously from the one side edge to the other sideedge, with respect to the width direction, of the absorbent body at aportion which the absorbent body is overlapped with, the position of theabsorbent body relative to the exterior member is suitably settled inthe second middle adhering region, and the absorbent body is less likelyto shift at a wearer's crotch. Therefore, wearing feeling of thedisposable diaper can be improved.

It is preferable that the front leg elastic member and the rear legelastic member are provided so as to extend intermittently across thecrotch part in the second middle adhering region. When the front legelastic member and the rear leg elastic member are provided in thismanner, the absorbent body is less likely to be distorted by contractionforce of the front leg elastic member and the rear leg elastic member,and fittability of the absorbent body to a wearer's crotch can beimproved.

It is preferable that the second central front adhering region isprovided so as to extend forward of a front end of the absorbent body,and/or the second central rear adhering region is provided so as toextend rearward of a rear end of the absorbent body. When the secondcentral front adhering region and/or the second central rear adheringregion are provided in this manner, the position of the end portion ofthe absorbent body in the front-rear direction is suitably settledrelative to the exterior member, and the absorbent body is less likelyto shift relative to the exterior member over a wide range in thefront-rear direction.

It is preferable that the second right front adhering region is providedso as to extend outward in the width direction from one side edge, withrespect to the width direction, of the absorbent body, and the secondleft front adhering region is provided so as to extend outward in thewidth direction from the other side edge, with respect to the widthdirection, of the absorbent body, and/or the second right rear adheringregion is provided so as to extend outward in the width direction fromone side edge, with respect to the width direction, of the absorbentbody, and the second left rear adhering region is provided so as toextend outward in the width direction from the other side edge, withrespect to the width direction, of the absorbent body. When each of theadhering regions is provided in this manner, the absorbent body is lesslikely to shift in the width direction relative to the exterior member,and it becomes easy to set the absorbent body at an intended positionwith respect to the exterior member when wearing the diaper.

It is preferable that the second right front adhering region and thesecond left front adhering region are provided so as to overlap with thefront leg elastic member and extend forward of the front leg elasticmember, and/or the second right rear adhering region and the second leftrear adhering region are provided so as to overlap with the rear legelastic member and extend rearward of the rear leg elastic member. Byproviding the second front adhering region and/or the second rearadhering region in this manner, the part of the front leg elastic memberand/or the rear leg elastic member that extends along the edge of theleg opening is adhered and fixed to the inner sheet and/or the outersheet.

It is preferable that the second middle adhering region is provided soas to extend outward in the width direction from one side edge and theother side edge, with respect to the width direction, of the absorbentbody to an outer edge of the exterior member. By providing the secondmiddle adhering region in this manner, the parts of the front legelastic member and the rear leg elastic member that cross the crotchpart and extend along the edge of the leg opening are adhered and fixedto the inner sheet and/or the outer sheet.

It is preferable that a body elastic member extending in the widthdirection is provided between the inner sheet and the outer sheet on thefront body part and the rear body part, and the second front adheringregion and/or the second rear adhering region is provided apart from thebody elastic member, whereby a non-adhering region in which the innersheet and the outer sheet are not adhered to each other is formedbetween the second front adhering region and the body elastic memberand/or between the second rear adhering region and the body elasticmember. By providing the non-adhering region in this manner, moistureaccumulated in the second front non-adhering region or the second rearnon-adhering region is easily discharged to the outside of the diaper.

With regard to the relationship with the first adhering region, thesecond front non-adhering region and the second rear non-adhering regionare preferably provided as follows. That is, it is preferable that: avalue of W_(A2)/W_(A1) is 0.20 or more and 0.65 or less, provided that alength from one side edge to the other side edge, with respect to thewidth direction, of the first adhering region is W_(A1) and a length ofthe second front non-adhering region in the width direction in a rangefrom the one side edge to the other side edge, with respect to the widthdirection, of the first adhering region is W_(A2), and/or a value ofW_(B2)/W_(B1) is 0.20 or more and 0.65 or less, provided that a lengthfrom one side edge to the other side edge, with respect to the widthdirection, of the first adhering region is W_(B1) and a length of thesecond rear non-adhering region in the width direction in a range fromthe one side edge to the other side edge, with respect to the widthdirection, of the first adhering region is W_(B2). Thereby, it becomeseasy to set the absorbent body at an intended position with respect tothe exterior member when wearing the diaper while increasing airpermeability of the exterior member.

It is preferable that a length of the second front non-adhering regionin the width direction is longer than a length of the second rearnon-adhering region in the width direction. Thereby, air permeability ona front side of the diaper, in which more urine tends to be collected,can be increased.

It is preferable that the second front adhering region and/or the secondrear adhering region has higher bending resistance than the secondmiddle adhering region. Thereby, the crotch part of the exterior memberis formed softly, and wearing feeling of the disposable diaper can beimproved.

It is preferable that a first side non-adhering region in which theabsorbent body is not adhered to the exterior member is provided on anouter side in the width direction of the first adhering region so as tooverlap with one side edge or the other side edge, with respect to thewidth direction, of the absorbent body, and the first side non-adheringregion is provided so as to overlap with the second front non-adheringregion and/or the second rear non-adhering region. Thereby, airpermeability at a portion where the exterior member is overlapped withthe absorbent body can be increased.

From the viewpoint of increasing air permeability of the exteriormember, the first adhering region and the second adhering region may beprovided as follows. That is, it may be configured that: the pluralityof first adhering regions are provided side by side in the widthdirection, whereby a first central non-adhering region in which theabsorbent body is not adhered to the exterior member is formed betweenthe plurality of first adhering regions; the plurality of second centralfront adhering regions are provided side by side in the width direction,whereby a second central front non-adhering region in which the innersheet and the outer sheet are not adhered to each other is formedbetween the plurality of the second central front adhering regions,and/or the plurality of second central rear adhering regions areprovided side by side in the width direction, whereby a second centralrear non-adhering region in which the inner sheet and the outer sheetare not adhered to each other is formed between the plurality of thesecond central rear adhering regions; and the first central non-adheringregion is provided so as to overlap with the second central frontnon-adhering region and/or the second central rear non-adhering region.

It is preferable that: the absorbent body is provided with rising flapson both sides in the width direction; the rising flap has a front endpart, a rear end part and a middle part positioned therebetween, a flapelastic member extending in the front-rear direction is provided in themiddle part, and the front end part and the rear end part are joined tothe top sheet, whereby the middle part is formed standable; and a frontedge of the second middle adhering region is located posterior to a rearedge of the front end part of the rising flap, and/or a rear edge of thesecond middle adhering region is located anterior to a front edge of therear end part of the rising flap. By providing the rising flap in thismanner, standing height of the rising flap can be supplemented by thesecond front non-adhering region or the second rear non-adhering regionat the front and rear ends of the middle part of the rising flap.

It is preferable that a standing base part of the rising flap is locatedat a position which the second front non-adhering region and/or thesecond rear non-adhering region is overlapped with. Thereby, when therising flap stands up, the rising flap can be raised higher.

Advantageous Effects of Invention

In the disposable diaper of the present invention, the absorbent body isadhered to a skin-facing side of the exterior member at the firstadhering region, and at a portion which the first adhering region isoverlapped with, the inner sheet and the outer sheet of the exteriormember are adhered to each other at the second central front adheringregion and/or the second central rear adhering region and further at thesecond middle adhering region provided therebetween. And on the bothsides, with respect to the width direction, of the second central frontadhering region and/or the second central rear adhering region, thesecond front non-adhering region and/or the second rear non-adheringregion in which the inner sheet and the outer sheet are not adhered toeach other are formed so as to overlap with absorbent body. Therefore,air permeability of the exterior member is increased due to the secondfront non-adhering region and/or the second rear non-adhering region,and sweat or moisture generated from a wearer is easily discharged tothe outside of the diaper. Meanwhile, since the second middle adheringregion is provided continuously from the one side edge to the other sideedge, with respect to the width direction, of the absorbent body at aportion which the absorbent body is overlapped with, it becomes easy tosuitably settle the position of the absorbent body relative to theexterior member in the second middle adhering region, and therefore,wearing feeling of the disposable diaper can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a perspective view of a disposable diaper.

FIG. 2 shows a plan view of the disposable diaper shown in FIG. 1, asviewed from a skin-facing side thereof, in a developed state where afront body part and a rear body part are disjoined.

FIG. 3 shows a cross-sectional view along a line III-III of thedisposable diaper shown in FIG. 2.

FIG. 4. shows a plan view of an exterior member of the disposable diaperas viewed from a skin-facing side thereof, and shows an example offorming a first adhering region where the absorbent body is adhered tothe exterior member.

FIG. 5 shows a plan view of the exterior member of the disposable diaperas viewed from the skin-facing side thereof, and shows an example offorming a second adhering region where an inner sheet and an outer sheetof the exterior member are adhered to each other.

FIG. 6 shows a partial plan view of the exterior member shown in FIG. 5on the skin-facing side.

FIG. 7 shows a plan view of the exterior member of the disposable diaperas viewed from the skin-facing side thereof, and shows an example offorming a first adhering region where the absorbent body is adhered tothe exterior member.

FIG. 8 shows a plan view of the exterior member of the disposable diaperas viewed from the skin-facing side thereof, and shows an example offorming a second adhering region where the inner sheet and the outersheet are adhered to each other.

FIG. 9 shows a partial plan view of the skin-facing side of the exteriormember shown in FIG. 8.

FIG. 10 shows a partial plan view of the disposable diaper in thedeveloped state shown in FIG. 2 as viewed from the skin-facing sidethereof.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

A disposable diaper of the present invention is explained with referenceto the drawings. However, the present invention is not limited to theembodiments shown in the drawings. FIGS. 1 to 3 show an example of adisposable diaper of the present invention. FIG. 1 shows a perspectiveview of a disposable diaper, FIG. 2 shows a plan view of the disposablediaper shown in FIG. 1, as viewed from a skin-facing side thereof, in adeveloped state where a front body part and a rear body part aredisjoined, and FIG. 3 shows a cross-sectional view along a line of thedisposable diaper shown in FIG. 2. In the drawings, an arrow xrepresents a width direction, an arrow y represents a front-reardirection, and the direction perpendicular to the surface formed by thearrows x and y represents a thickness direction z.

A disposable diaper 1 comprises an exterior member 2 having a front bodypart P, a rear body part Q and a crotch part R positioned therebetween.The exterior member 2 is formed into a pants shape having a waistopening 3 and a pair of leg openings 4 by joining the front body part Pand the rear body part Q. The waist opening 3 is an opening throughwhich a wearer's trunk is put, and the leg opening 4 is an openingthrough which a wearer's leg is put.

In the exterior member 2, the front body part P corresponds to a partapplied to an abdomen side of a wearer in wearing the diaper, and therear body part Q corresponds to a part applied to a back side of awearer in wearing the diaper. The front body part P and the rear bodypart Q are joined to each other on both sides in the width direction xin a state of being formed into a pants shape. The crotch part R ispositioned between the front body part P and the rear body part Q, andcorresponds to a part applied to a crotch of a wearer. The crotch part Ris located in the middle of the exterior member 2 when the exteriormember 2 is divided into three in the front-rear direction y, and is notjoined to each other on both sides in the width direction x in a stateof being formed into a pants shape. The exterior member 2 is formed intoa pants shape by joining the front body part P and the rear body part Qat side joint parts 11 on both sides in the width direction x.

In the disposable diaper 1, the front-rear direction y means a directionextending from the front body part P to the rear body part Q, andcorresponds to a front-rear direction in a wearer's crotch when thediaper is worn. The width direction x corresponds to a left-rightdirection of a wearer when the diaper is worn. A skin-facing side of thedisposable diaper means a side facing a wearer's skin when the diaper isworn, and an outer side of the disposable diaper means a side facingaway from the wearer when the diaper is worn.

An absorbent body 7 is provided on the crotch part R of the exteriormember 2. The absorbent body 7 comprises a top sheet 8, a back sheet 9and an absorber 10 disposed therebetween (see FIG. 3). The top sheet 8is a sheet located on a wearer's side when the diaper is worn, and isprovided on the skin-facing side of the absorber 10. The top sheet 8 ispreferably liquid-permeable. The back sheet 9 is a sheet located on aside opposite to a wearer when the diaper is worn, and is provided onthe outer side of the absorber 10. The back sheet 9 is preferablyliquid-impermeable. Urine and the like excreted from a wearer passesthrough the top sheet 8 and is stored by the absorber 10, and the backsheet 9 prevents the excrement from leaking to the outside.

As the liquid-permeable top sheet, a nonwoven fabric formed fromhydrophilic fibers such as cellulose, rayon and cotton, a nonwovenfabric which is formed from hydrophobic fibers such as polyolefin (e.g.,polypropylene, polyethylene), polyester (e.g., PET) and polyamide (e.g.,nylon), and whose surface is hydrophilized with a surfactant, or thelike can be used, for example. As the top sheet, a woven fabric, aknitted fabric, a plastic film having holes or the like may be alsoused.

As the liquid-impermeable back sheet, a nonwoven fabric formed fromhydrophobic fibers such as polyolefin (e.g., polypropylene,polyethylene), polyester (e.g., PET) and polyamide (e.g., nylon), aplastic film, or the like can be used, for example. The back sheet maybe composed of a laminate of two or more sheets, and for example, alaminate of a non-woven fabric and a plastic film may be used. In thiscase, the sheets constituting the laminate may have the same size ordifferent sizes from each other. The back sheet may beliquid-impermeable and moisture-permeable.

The absorber is not particularly restricted as long as it contains anabsorbent material which is able to absorb excrement such as urine. Asthe absorber, a shaped product of an absorbent material, which is formedinto a certain shape, may be used. The absorber may be wrapped with acover sheet such as a paper (e.g., a tissue paper and a thin paper) anda liquid-permeable nonwoven fabric. Examples of the absorbent materialinclude, for example, a hydrophilic fiber such as a pulp fiber, and anabsorbent polymer such as a polyacrylic absorbent polymer, apolyasparaginic absorbent polymer, a cellulosic absorbent polymer, and astark-acrylonitrile absorbent polymer. The absorbent material mayinclude a thermal fusion fiber such as a polyolefin (e.g., polyethyleneand polypropylene) fiber, a polyester (e.g., PET) fiber and a polyamide(e.g., nylon) fiber. These thermal fusion fibers may be hydrophilizedwith a surfactant or the like to increase affinity with bodily fluidsuch as urine. The absorbent material preferably includes at least anabsorbent polymer in view of enhancing absorption capacity.

The absorber may be an absorbent sheet which is configured so as tocontain an absorbent polymer but not contain a pulp fiber betweennonwoven fabric sheets. The thus configured absorbent sheet mannerenables having high absorption capacity since it contains an absorbentpolymer between nonwoven fabric sheets, while it can be formed thinwithout being bulky since it does not contain a pulp fiber betweennonwoven fabric sheets.

In the absorber, an absorbent fiber may be used as the absorbentmaterial. Also in this case, the absorber is formed thin without beingbulky. Examples of the absorbent fiber include a fiber having aprotonated carboxyl group or a carboxylate group. The absorbent fibercan be obtained by, for example, hydrolyzing an acrylic fiber, therebyconverting a nitrile group contained in the acrylic fiber to acarboxylic group. The carboxyl group contained in the absorbent fiberpreferably forms an alkaline metal salt or an ammonium salt. Theabsorbent fiber also can be prepared by immersing a hydrophilic fiber inacrylic acid to deposit acrylic acid on the surface of the fiber.

The shape (planar shape) of the absorber 10 is not particularly limited.Examples of the shape of the absorber 10 include, for example, asubstantially rectangular shape, an hourglass shape, a gourd shape, abattledore shape, and the like. In the drawing, the absorber 10 isformed in a substantially rectangular shape.

It is preferable that the absorbent body 7 is provided with rising flaps12 on both sides in the width direction x (see FIGS. 2 and 3). Therising flap 12 enables preventing leakage of excrement such as urine.The rising flap 12 is provided on a skin-facing side of the absorbentbody 7, and is preferably joined to the top sheet 8. The rising flap 12is preferably provided with a flap elastic member 13 at an upper endpart thereof in its standing state (an end part on a wearer's side). Therising flap 12 is promoted to stand up by contractive force of the flapelastic member 13.

The exterior member 2 comprises an inner sheet 5 disposed on askin-facing side thereof and an outer sheet 6 disposed on an outer sidethereof. The absorbent body 7 is provided on the skin-facing side of theinner sheet 5. The outer sheet 6 is provided so that its outer surfacefaces the outside of the diaper. The inner sheet 5 and the outer sheet 6are respectively configured to have the front body part P, the rear bodypart Q and the crotch part R. The inner sheet 5 and the outer sheet 6may be liquid-permeable or liquid-impermeable, and a sheet material thatmay be used for the top sheet 8 or the back sheet 9 can be used. Theinner sheet 5 and the outer sheet 6 are preferably moisture-permeable,whereby wearing feeling of the exterior member 2 can be improved.

In the case where a nonwoven fabric is used as a sheet material for thetop sheet, the back sheet, the outer sheet, the inner sheet or the likedescribed above, a spunbonded nonwoven fabric, an air-through nonwovenfabric, a point-bonded nonwoven fabric, a meltblown nonwoven fabric, anSMS nonwoven fabric or the like is preferably used as the nonwovenfabric, that makes it easy to obtain a thin and durable sheet.

In the exterior member 2, a leg elastic member 22 is provided betweenthe inner sheet 5 and the outer sheet 6 along an edge of the leg opening4. The leg elastic member 22 includes a front leg elastic member 22Fdisposed so as to extend across the crotch part R and along a front sideof the edge of the leg opening 4 and a rear leg elastic member 22Bdisposed so as to extend across the crotch part R and along a rear sideof the edge of the leg opening 4. The front leg elastic member 22F andthe rear leg elastic member 22B gives elastic members disposed alongalmost the entire circumference of the edge of the leg opening 4,thereby forming leg-gathers around a wearer's leg, and leakage of urineand the like from the crotch is prevented. In the drawings, the frontleg elastic member 22F and the rear leg elastic member 22B are disposedseparately from each other, however, the front leg elastic member 22Fand the rear leg elastic member 22B may be disposed in contact with eachother or disposed so as to intersect with each other.

It is preferable that a plurality of body elastic members 20 extendingin the width direction x are provided between the outer sheet 5 and theinner sheet 6 in the front body part P and the rear body part Q of theexterior member 2. The body elastic members 20 are disposed between thewaist opening 3 and the leg opening 4. By disposing the body elasticmember 20, fittability around a wearer's trunk can be enhanced. Amongthe body elastic members 20, elastic members arranged at narrowintervals in the front-rear direction y along the edge of the waistopening 3 may be provided as waist elastic members 21, and thereby,waist gathers around a wearer's waist are formed and leakage ofexcrement such as urine from the back side or the abdomen side isprevented. In the FIGS. 1 and 2, the waist elastic members 21 areprovided at a narrower interval in the front-rear direction y than thebody elastic members 20.

The exterior member 2 may be folded back along the edge of the waistopening 3. For example, the outer sheet 6 may be folded back toward theinner sheet 5 at the edge of the waist opening 3 of the exterior member2 (not shown). In this case, the waist elastic member 21 may be disposedbetween the folded outer sheets 6 and adhered to the outer sheet 6.

As each elastic member provided in the disposable diaper 1, elasticmaterials such as a polyurethane thread, a polyurethane film, a naturalrubber and the like, that are generally used for disposable diapers, canbe used. Each elastic member is preferably fixed to the diaper in astretched state, and is preferably fixed with an adhesive such as ahot-melt adhesive. For example, a polyurethane thread having a finenessof 40 dtex to 1,240 dtex is stretched at a ratio of 1.1 to 5.0 times andis disposed to be fixed. As the adhesive, a rubber hot-melt adhesive ispreferably used. Regarding the above-described ratio, an unexpandedstate is defined as 1.0 time.

The absorbent body 7 is provided at least on the crotch part R of theskin-facing side of the exterior member 2, and preferably furtherextends to the front body part P and/or the rear body part Q. Theabsorbent body 7 may be formed into, for example, a substantiallyhourglass shape or a substantially rectangular shape.

The absorbent body 7 is adhered to the skin-facing side of the exteriormember 2 at a first adhering region. The first adhering region may beprovided on the entire surface of the absorbent body 7 on the outersurface side, or may be provided only in a part thereof. FIG. 4 shows aplan view of the exterior member 2 as viewed from the skin-facing sidethereof, an outline of the absorbent body 7 provided on the exteriormember 2 is indicated by a dashed-dotted line, and the first adheringregion 14 where the absorbent body 7 is adhered to the exterior member 2is indicated by cross-hatching. In the FIG. 4, an example in which thefirst adhering region 14 is provided on substantially the entire surfaceof the absorbent body 7 on the outer surface side is shown.

As is described below, the first adhering region 14 is provided so as tooverlap with a second middle adhering region 16M, a second central frontadhering region 16CF or a second central rear adhering region 16CB as asecond adhering region 16 in which the inner sheet 5 and the outer sheet6 are adhered to each other. The first adhering region 14 may beprovided continuously or intermittently in the front-rear direction y,and the first adhering region 14 is preferably provided continuouslyfrom a portion which the second middle adhering region 16M is overlappedwith to a portion which the second central front adhering region 16CF orthe second central rear adhering region 16CB is overlapped with, andmore preferably provided continuously from a portion which the secondcentral front adhering region 16CF is overlapped with to a portion whichthe second central rear adhering region 16CB is overlapped with. Fromthe viewpoint of stably fixing the absorbent body 7 to the exteriormember 2, the first adhering region 14 is preferably provided in a widerange in the front-rear direction y in the absorbent body 7. Forexample, a length of the first adhering region 14 in the front-reardirection y (in the case where there are a plurality of them, a totallength thereof) is preferably 70% or more, preferably 80% or more, evenmore preferably 90% or more of a length of the absorbent body 7 in thefront-rear direction y.

The first adhering region 14 may be provided continuously orintermittently in the width direction x. In the case that the firstadhering region 14 is provided intermittently in the width direction x,a first non-adhering region 15 in which the absorbent body 7 is notadhered to the exterior member 2 is formed between the adjacent firstadhering regions 14. In this case, it is preferable that the 2 or moreand 5 or less, more preferably 4 or less, and even more preferably 3 orless first adhering regions 14 are arranged side by side in the widthdirection x.

In the case that the first adhering region 14 is provided intermittentlyin width direction x, a length of the first adhering region 14 in thewidth direction x (a total length of the plurality of them) ispreferably 15% or more, more preferably 20% or more, even morepreferably 30% or more, and preferably 90% or less, more preferably 80%or less, even more preferably 70% or less of a length of the absorbentbody 7 in the width direction x. In the case that the first adheringregion 14 is provided continuously in the width direction x, the lengthof the first adhering region 14 in the width direction x is preferably60% or more, more preferably 70% or more, even more preferably 80% ormore of the length of the absorbent body 7 in the width direction x.

In the case that the first adhering region 14 is provided continuouslywith respect to both the width direction x and the front-rear directiony, the first adhering region 14 is preferably formed in a substantiallyrectangular shape. In the case that the first adhering region 14 isprovided intermittently with respect to the width direction x and/or thefront-rear direction y, it is preferable that adhering regions eachformed in a substantially rectangular shape are arranged side by side inthe width direction x and/or the front-rear direction y, whereby thefirst adhering region 14 is formed.

In the exterior member 2, the inner sheet 5 and the outer sheet 6 areadhered to each other at the second adhering region 16. FIG. 5 shows aplan view of the exterior member 2 as viewed from the skin-facing sidethereof, an outline of the absorbent body 7 provided on the exteriormember 2 is indicated by a dashed-dotted line, an outline of the firstadhering region 14 is indicated by a dashed-two dotted line, and thesecond adhering region 16 in which the inner sheet 5 and the outer sheet6 of the exterior member 2 are adhered to each other is indicated bycross-hatching. In FIG. 5, the outline of the first adhering region 14shown in FIG. 4 is indicated by a dashed-two dotted line.

The second adhering region 16 includes a second middle adhering region16M provided at the crotch part, a second front adhering region 16Flocated anterior to the second middle adhering region 16M and a secondrear adhering region 16B located posterior to the second middle adheringregion 16M. The second front adhering region 16F, the second middleadhering region 16M and the second rear adhering region 16B are definedby dividing the exterior member 2 in the front-rear direction y, and areprovided so as to extend in the width direction x, respectively.

The second middle adhering region 16M is provided so that at least apart thereof overlaps with the first adhering region 14, and is providedcontinuously from one side edge to the other side edge, with respect tothe width direction x, of the absorbent body 7 at a portion which theabsorbent body 7 is overlapped with. In the second middle adheringregion 16M, the front leg elastic member 22F and the rear leg elasticmember 22B are provided so as to extend across the crotch part R. As thefront leg elastic member 22F and the rear leg elastic member 22B extendacross the crotch part R in the second middle adhering region 16M, thefront leg elastic member 22F and the rear leg elastic member 22B arefirmly adhered and fixed to the inner sheet 5 and/or the outer sheet 6at the portion which the absorbent body 7 is overlapped with. Forexample, as is described below, in the case that the front leg elasticmember 22F and the rear leg elastic member 22B are provided so as toextend intermittently across the crotch part R, an appearance of thediaper can be improved since fragments of the front leg elastic member22F and the rear leg elastic member 22B are not dispersed.

The second front adhering region 16F is provided on a front side of thesecond middle adhering region 16M, and is provided intermittently in thewidth direction x so that at least a part thereof overlaps with thefirst adhering region 14. The second rear adhering region 16B isprovided on a rear side of the second middle adhering region 16M, and isprovided intermittently in the width direction x so that at least a partthereof overlaps with the first adhering region 14. Specificallyexplaining the second front adhering region 16F and the second rearadhering region 16B with reference to FIG. 6, the second front adheringregion 16F includes a second right front adhering region 16RF providedon one side in the width direction x so as not to overlap with the firstadhering region 14, a second left front adhering region 16LF provided onthe other side in the width direction x so as not to overlap with thefirst adhering region 14, and a second central front adhering region16CF provided therebetween so as to overlap with the first adheringregion 14. And, second front non-adhering regions 17F in which the innersheet 5 and the outer sheet 6 are not adhered to each other are formedbetween the second right front adhering region 16RF and the secondcentral front adhering region 16CF and between the second left frontadhering region 16LF and the second central front adhering region 16CFso as to overlap with the absorbent body 7. The second rear adheringregion 16B includes a second right rear adhering region 16RB provided onone side in the width direction x so as not to overlap with the firstadhering region 14, a second left rear adhering region 16LB provided onthe other side in the width direction x so as not to overlap with thefirst adhering region 14, and a second central rear adhering region 16CBprovided therebetween so as to overlap with the first adhering region14. And, second rear non-adhering regions 17B in which the inner sheet 5and the outer sheet 6 are not adhered to each other are formed betweenthe second right rear adhering region 16RB and the second central rearadhering region 16CB and between the second left rear adhering region16LB and the second central rear adhering region 16CB so as to overlapwith the absorbent body 7.

Since the exterior member 2 is configured so that the second frontnon-adhering region 17F or the second rear non-adhering region 17B areformed at the portion which the absorbent body 7 is overlapped with inthis manner, air permeability is increased, and sweat or moisturegenerated from a wearer is easily discharged to the outside of thediaper. In the disposable diaper 1, air permeability tends to beparticularly poor at a portion where the exterior member 2 is overlappedwith the absorbent body 7, however, when the second non-adhering region17 in which the inner sheet 5 and the outer sheet 6 are not adhered toeach other is formed at the portion which the absorbent body 7 isoverlapped with in the exterior member 2, air permeability at theportion where the exterior member 2 is overlapped with the absorbentbody 7 can be improved. In addition, in the case that the back sheet 9of the absorbent body 7 is moisture permeable, after urine or the likeis absorbed by the absorbent body 7, fluid becomes moisture andpermeates through the moisture permeable back sheet 9 and furtherpermeates through the second front non-adhering region 17F or the secondrear non-adhering region 17B, thereby being preferably discharged to theoutside of the diaper.

Here, when the second non-adhering region 17 in which the inner sheet 5and the outer sheet 6 are not adhered to each other is formed in theexterior member 2 in this manner, there is concern that the absorbentbody 7 easily moves at a wearer's crotch and it may be difficult to setit at an intended position when wearing the diaper. Therefore, in thedisposable diaper 1, the second middle adhering region 16M is providedcontinuously from one side edge to the other side edge, with respect tothe width direction x, of the absorbent body 7 at a portion which theabsorbent body 7 is overlapped with. Thereby, the position of theabsorbent body 7 relative to the exterior member 2 is suitably settledin the second middle adhering region 16M, and the absorbent body 7 isless likely to shift relative to the exterior member 2 (particularly tothe outer sheet 6). Therefore, wearing feeling of the disposable diaper1 can be improved.

In the case where the disposable diaper 1 is provided with the risingflap 12, as the inner sheet 5 and the outer sheet 6 are separated fromeach other in the second front non-adhering region 17F and the secondrear non-adhering region 17B, both side parts of the absorbent body 7 inthe width direction x are easily deformed when wearing the diaper,thereby also obtaining the effect that standing height of the risingflap 12 can be supplemented. In this case, the effect of preventinglateral leakage of urine or the like by the rising flap 12 can beenhanced.

In the disposable diaper 1, both the second front adhering region 16Fand the second rear adhering region 16B are preferably provided asdescribed above, however, only the second front adhering region 16F oronly the second rear adhering region 16B may be provided as describedabove.

It is preferable that the second right front adhering region 16RF isprovided so as to overlap with one side edge, with respect of the widthdirection x, of the absorbent body 7, and the second left front adheringregion 16LF is provided so as to overlap with the other side edge, withrespect to the width direction x, of the absorbent body 7. When thesecond right front adhering region 16RF and the second left frontadhering region 16LF are provided in this manner, both end parts, withrespect to the width direction x, of the absorbent body 7 are lesslikely to shift relative to the exterior member 2 (particularly to theouter sheet 6), and it becomes easy to set the absorbent body 7 at anintended position when wearing the diaper. Further, it is preferablethat the second right front adhering region 16RF and the second leftfront adhering region 16LF are provided so as to extend forward of afront end of the absorbent body 7. Similarly, it is preferable that thesecond right rear adhering region 16RB is provided so as to overlap withone side edge, with respect of the width direction x, of the absorbentbody 7, and the second left rear adhering region 16LB is provided so asto overlap with the other side edge, with respect of the width directionx, of the absorbent body 7. Further, it is preferable that the secondright rear adhering region 16RB and the second left rear adhering region16LB are provided so as to extend rearward of a rear end of theabsorbent body 7.

It is preferable that the second right front adhering region 16RF isprovided so as to extend outward in the width direction x from the oneside edge, with respect to the width direction x, of the absorbent body7, and the second left front adhering region 16LF is provided so as toextend outward in the width direction x from the other side edge, withrespect to the width direction x, of the absorbent body 7. In this case,the second right front adhering region 16RF and the second left frontadhering region 16LF preferably extend to a region within 10 mm (morepreferably within 5 mm) inward from the side joint part 11 of theexterior member 2 in the width direction x. When the second right frontadhering region 16RF and the second left front adhering region 16LF areprovided in this manner, the absorbent body 7 is less likely to shift inthe width direction x relative to the exterior member 2 (particularly tothe outer sheet 6), and it becomes easy to set the absorbent body 7 atan intended position with respect to the exterior member 2 when wearingthe diaper. For the same reason, it is preferable that the second rightrear adhering region 16RB is provided so as to extend outward in thewidth direction x from the one side edge, with respect to the widthdirection x, of the absorbent body 7, and the second left rear adheringregion 16LB is provided so as to extend outward in the width direction xfrom the other side edge, with respect to the width direction x, of theabsorbent body 7. Further, it is preferable that the second right rearadhering region 16RB and the second left rear adhering region 16LBextend to a region within 10 mm (more preferably within 5 mm) inwardfrom the side joint part 11 of the exterior member 2 in the widthdirection x.

As shown in FIG. 4, it is preferable that a first non-adhering region 15in which the absorbent body 7 is not adhered to the exterior member 2 isprovided on an outer side in the width direction x of the first adheringregion 14 so as to overlap with one side edge or the other side edge,with respect to the width direction x, of the absorbent body 7(hereinafter, the first non-adhering region provided so as to overlapwith the one side edge or the other side edge, with respect to the widthdirection, of the absorbent body may be referred to as a “first sidenon-adhering region”). As a result, air permeability at a portion wherethe exterior member 2 is overlapped with the absorbent body 7 can beincreased. In this case, the first side non-adhering region 15 ispreferably provided so as to overlap with the second right frontadhering region 16RF and/or the second left front adhering region 16LF,and is more preferably provided so as to also overlap with the secondfront non-adhering region 17F. In addition, the first side non-adheringregion 15 is preferably provided so as to overlap with the second rightrear adhering region 16RB and/or the second left rear adhering region16LB, and is more preferably provided so as to also overlap with thesecond rear non-adhering region 17B. In the case that the first sidenon-adhering region 15 is provided, the length of the first sidenon-adhering region 15 in the width direction x (a total length of thefirst side non-adhering region 15 on the right side and the first sidenon-adhering region 15 on the left side) is preferably 5% or more, morepreferably 10% or more, and preferably 60% or less, more preferably 50%or less of the length of the absorbent body 7 in the width direction x.

It is preferable that the second right front adhering region 16RF andthe second left front adhering region 16LF are provided so as to overlapwith the front leg elastic member 22F and extend forward of the frontleg elastic member 22F. By providing the second right front adheringregion 16RF and the second left front adhering region 16LF in thismanner, the part of the front leg elastic member 22F that extends alongthe edge of the leg opening 4 is adhered and fixed to the inner sheet 5and/or the outer sheet 6. Also, it is preferable that the second rightrear adhering region 16RB and the second left rear adhering region 16LBare provided so as to extend outward in the width direction x from oneside edge, with respect to the width direction x, of the absorbent body7, overlap with the rear leg elastic member 22B, and extend rearward ofthe rear leg elastic member 22B. By providing the second right rearadhering region 16RB and the second left rear adhering region 16LB inthis manner, the part of the rear leg elastic member 22B that extendsalong the edge of the leg opening 4 is adhered and fixed to the innersheet 5 and/or the outer sheet 6. Forward of the front leg elasticmember 22F means forward of the most front end of the front leg elasticmember 22F, and rearward of the rear leg elastic member 22B meansrearward of the most rear end of the rear leg elastic member 22B.

It is preferable that the second central front adhering region 16CF isprovided so as to extend forward of the front end of the absorbent body7. Also, it is preferable that the second central rear adhering region16CB is provided so as to extend rearward of the rear end of theabsorbent body 7. When the second central front adhering region 16CF andthe second central rear adhering region 16CB are provided in thismanner, the position of the end portion of the absorbent body 7 in thefront-rear direction y is suitably settled relative to the exteriormember 2, and the absorbent body 7 is less likely to shift relative tothe exterior member 2 (particularly to the outer sheet 6) over a widerange in the front-rear direction y.

On the front side of the second front adhering region 16F, it ispreferable that a non-adhering region in which the inner sheet 5 and theouter sheet 6 are not adhered to each other is formed adjacent to thesecond front adhering region 16F. Also, on the rear side of the secondrear adhering region 16B, it is preferable that a non-adhering region inwhich the inner sheet 5 and the outer sheet 6 are not adhered to eachother is formed adjacent to the second rear adhering region 16B. And thesecond front non-adhering region 17F and/or the second rear non-adheringregion 17B are preferably connected to these non-adhering regions.Thereby, moisture accumulated in the second front non-adhering region17F or the second rear non-adhering region 17B is easily discharged tothe outside of the diaper.

As shown in FIG. 5, in the case that the body elastic member 20 isdisposed on the front body part P and the rear body part Q of theexterior member 2, it is preferable that the second front adheringregion 16F and/or the second rear adhering region 16B is provided apartfrom the body elastic member 20, and a non-adhering region in which theinner sheet 5 and the outer sheet 6 are not adhered to each other isformed between the second front adhering region 16F and the body elasticmember 20 and/or between the second rear adhering region 16B and thebody elastic member 20. By providing the non-adhering region in thismanner, moisture accumulated in the second front non-adhering region 17For the second rear non-adhering region 17B is easily discharged to theoutside of the diaper.

In the case that the plurality of body elastic members 20 are disposedin the front body part P and the rear body part Q of the exterior member2, it is preferable that the body elastic members 20 are adhered to theinner sheet 5 and the outer sheet 6, and a non-adhering region in whichthe inner sheet 5 and the outer sheet 6 are not adhered to each other isformed so as to extend in the width direction x between the adjacentbody elastic members 20. Thereby, air permeability of the exteriormember 2 can be increased even in the region where the body elasticmembers 20 are disposed in the front body part P and the rear body partQ.

It is preferable that the second front non-adhering region 17F extendsforward of the front end of the absorbent body 7 from the positionoverlapping the absorbent body 7 on the front side of the second middleadhering region 16M. Similarly, it is preferable that the second rearnon-adhering region 17B extends rearward of the rear end of theabsorbent body 7 from the position overlapping the absorbent body 7 onthe rear side of the second middle adhering region 16M. When the secondfront non-adhering region 17F and/or the second rear non-adhering region17B is formed in this manner, moisture accumulated in the second frontnon-adhering region 17F or the second rear non-adhering region 17B iseasily discharged to the outside of the diaper.

It is preferable that the second middle adhering region 16M is providedcontinuously from one side edge to the other side edge, with respect tothe width direction x, of the absorbent body 7 in a portion which theabsorbent body 7 is overlapped with and is further provided so as toextend outward in the width direction x from the one side edge and theother side edge, with respect to the width direction x, of the absorbentbody 7 to an outer edge of the exterior member 2. By providing thesecond middle adhering region 16M in this manner, the parts of the frontleg elastic member 22F and the rear leg elastic member 22B that crossthe crotch part R and extend along the edge of the leg opening 4 areadhered and fixed to the inner sheet 5 and/or the outer sheet 6.

It is preferable that the front leg elastic member 22F and the rear legelastic member 22B extend intermittently across the crotch part in thesecond middle adhering region 16M. In other parts, it is preferable thatthe front leg elastic member 22F and the rear leg elastic member 22Bcontinuously extend. When the front leg elastic member 22F and the rearleg elastic member 22B are provided in this manner, the absorbent body 7is less likely to be distorted by contraction force of the front legelastic member 22F and the rear leg elastic member 22B, and fittabilityof the absorbent body 7 to a wearer's crotch can be improved. Forproviding the leg elastic member 22 is intermittently, the leg elasticmember 22 may be adhered and fixed to the inner sheet 5 and/or the outersheet 6, followed by cutting the leg elastic member 22 with a cutter orthe like. By doing so, the leg elastic member 22 can be easilyintermittently disposed in manufacturing, and the contraction force ofthe elastic member can be substantially lost at a part where the legelastic member 22 is intermittently disposed.

The length of the second middle adhering region 16M in the front-reardirection y is not particularly limited, as long as the second middleadhering region 16M is provided so as to overlap with both a part of thefront leg elastic member 22F that crosses the crotch part R and a partof the rear leg elastic member 22B that crosses the crotch part R. Thelength of the second middle adhering region 16M in the front-reardirection y is preferably 20% or more, more preferably 25% or more ofthe length of the absorbent body 7 in the front-rear direction y. Inaddition, from the viewpoint of securing the length of the second frontnon-adhering region 17F and the second rear non-adhering region 17B inthe front-rear direction y and enhancing air permeability of theexterior member 2, the length of the second middle adhering region 16Min the front-rear direction y is preferably 50% or less, more preferably45% or less, even more preferably 40% or less of the length of theabsorbent body 7 in the front-rear direction y.

The length, with respect of the front-rear direction y, of a part of thesecond front adhering region 16F or the second rear adhering region 16Bthat overlaps with the absorbent body 7 is preferably 10% or more, morepreferably 15% or more, even more preferably 20% or more, and preferably50% or less, more preferably 45% or less, even more preferably 40% orless of the length of the absorbent body 7 in the front-rear directiony, respectively.

The lengths of the second front adhering region 16F and the second rearadhering region 16B in the front-rear direction y may be the same ordifferent from each other, however, it is preferable that the length ofthe second rear adhering region 16B in the front-rear direction y islonger than that of the second front adhering region 16F.

The second front adhering region 16F may be provided in contact with thesecond middle adhering region 16M, or may be provided apart from that inthe front-rear direction y. The second rear adhering region 16B may alsobe provided in contact with the second middle adhering region 16M, ormay be provided apart from that in the front-rear direction y. However,from the viewpoint of enhancing air permeability of the exterior member2, the second front adhering region 16F and/or the second rear adheringregion 16B is preferably provided apart from the second middle adheringregion 16M in the front-rear direction y. In this case, a non-adheringregion in which the inner sheet 5 and the outer sheet 6 are not adheredto each other is formed at a portion where the second front adheringregion 16F or the second rear adhering region 16B is separated from thesecond middle adhering region 16M, and moisture accumulated in thesecond front non-adhering region 17F or the second rear non-adheringregion 17B is easily discharged to the outside of the diaper throughthis non-adhering region. The separation distance between the secondfront adhering region 16F and the second middle adhering region 16M inthe front-rear direction y and the separation distance between thesecond rear adhering region 16B and the second middle adhering region16M in the front-rear direction y of this case are preferably 2 mm ormore, and preferably 20 mm or less, more preferably 15 mm or less, evenmore preferably 10 mm or less.

The only one second center front adhering region 16CF may be providedbetween the second right front adhering region 16RF and the second leftfront adhering region 16LF, or the plurality of second central frontadhering regions 16CF may be provided side by side in the widthdirection x between them. The only one second center rear adheringregion 16CB may be provided between the second right rear adheringregion 16RB and the second left rear adhering region 16LB, or theplurality of second center rear adhering regions 16CB may be providedside by side in the width direction x between them. The number of thesecond center front adhering region 16CF is preferably 3 or less andmore preferably 2 or less. The number of the second center rear adheringregion 16CB is preferably 3 or less and more preferably 2 or less.Therefore, the number of the second front non-adhering region 17F ispreferably 4 or less and more preferably 3 or less. The number of thesecond rear non-adhering region 17B is preferably 4 or less and morepreferably 3 or less.

The length of the second front non-adhering region 17F in the widthdirection x (in the case where there are a plurality of them, a totallength thereof) and the length of the second rear non-adhering region17B in the width direction x (in the case where there are a plurality ofthem, a total length thereof) is preferably 10% or more, more preferably15% or more of the length of the absorbent body 7 in the width directionx, from the viewpoint of increasing air permeability of the exteriormember 2. In addition, from the viewpoint of facilitating the absorbentbody 7 to be easily set in an intended position with respect to theexterior member 2 (particularly to the outer sheet 6), the length of thesecond front non-adhering region 17F in the width direction x and thelength of the second rear non-adhering region 17B in the width directionx is preferably 80% or less, more preferably 70% or less of the lengthof the absorbent body 7 in the width direction x.

With regard to the relationship with the first adhering region 14, thesecond central front adhering region 16CF and the second central rearadhering region 16CB are preferably provided as follows. That is, asshown in FIG. 6, provided that the length from one side edge to theother side edge, with respect to the width direction x, of the firstadhering region 14 (specifically, the length of a portion where thefirst adhering region 14 is overlapped with the second front adheringregion 16F and the second front non-adhering region 17F in the widthdirection x) is Wm and the length of the second front non-adheringregion 17F in the width direction x in a range from the one side edge tothe other side edge, with respect to the width direction x, of the firstadhering region 14 is W_(A2), the value of W_(A2)/W_(A1) is preferably0.20 or more, more preferably 0.25 or more, even more preferably 0.30 ormore, and preferably 0.65 or less, more preferably 0.60 or less, evenmore preferably 0.55 or less. Similarly, provided that the length fromone side edge to the other side edge, with respect to the widthdirection x, of the first adhering region 14 is W_(B1) (specifically,the length of a portion where the first adhering region 14 is overlappedwith the second rear adhering region 16B and the second rearnon-adhering region 17B in the width direction x) and the length of thesecond rear non-adhering region 17B in the width direction x in a rangefrom the one side edge to the other side edge, with respect to the widthdirection x, of the first adhering region 14 is W_(A1), the value ofW_(B2)/W_(B1) is preferably 0.20 or more, more preferably 0.25 or more,even more preferably 0.30 or more, and preferably 0.65 or less, morepreferably 0.60 or less, even more preferably 0.55 or less. Thereby, itbecomes easy to set the absorbent body 7 at an intended position withrespect to the exterior member 2 (particularly to the outer sheet 6)when wearing the diaper while increasing air permeability of theexterior member 2. In the case that the plurality of first adheringregion 14 are provided side by side in the width direction x, the lengthfrom the one side edge to the other side edge, with respect to the widthdirection x, of the first adhering region 14 means the length from oneside edge, with respect to the width direction x, of the first adheringregion 14 on the most one side in the width direction x and the otherside edge, with respect to the width direction x, of the first adheringregion 14 on the most the other side in the width direction x.

The lengths of the second front non-adhering region 17F and the secondrear non-adhering region 17B in the width direction x may be the same ordifferent from each other. Also, the lengths of the second central frontadhering region 16CF and the second central rear adhering region 16CB inthe width direction x may be the same or different from each other. Thelength of each of these regions in the width direction x means a totallength of them in the case where there are the plurality of them. Fromthe viewpoint of increasing air permeability on a front side of thediaper, in which more urine tends to be collected, the length W_(A1) ofthe second front non-adhering region 17F in the width direction x islonger than the length W_(B2) of the second rear non-adhering region 17Bin the width direction x. In other ward, it is preferable that thelength of the second central front adhering region 16CF in the widthdirection x is shorter than the length of the second central rearadhering region 16CB in the width direction x.

For the same reason, it is preferable that an area of the second frontnon-adhering region 17F is larger than that of the second rearnon-adhering region 17B. Or, it is preferable that an area of the secondcentral front adhering region 16CF is smaller than that of the secondcentral rear adhering region 16CB.

From the viewpoint of increasing air permeability of the disposablediaper 1, it is preferable that the plurality of first adhering regions14 are provided side by side in the width direction x, and the pluralityof second central front adhering regions 16CF and/or second central rearadhering regions 16CB are also provided side by side in the widthdirection x. An example of the disposable diaper 1 configured in thismanner is shown in FIGS. 7 to 9. FIG. 7 shows a configuration example inwhich the two first adhering regions 14 are provided side by side in thewidth direction x, and an outline of the absorbent body 7 provided onthe exterior member 2 is indicated by a dashed-dotted line and the firstadhering region 14 where the absorbent body 7 is adhered to the exteriormember 2 is indicated by cross-hatching. FIGS. 8 and 9 show aconfiguration example in which the two second central front adheringregions 16CF are provided side by side in the width direction x and thetwo second central rear adhering regions 16CB are provided side by sidein the width direction x, and an outline of the absorbent body 7provided on the exterior member 2 is indicated by a dashed-dotted line,an outline of the first adhering region 14 shown in FIG. 7 is indicatedby a dashed-two dotted line, and the second adhering region 16 where theinner sheet 5 and the outer sheet 6 of the exterior member 2 are adheredto each other is indicated by cross-hatching. FIG. 9 shows a partialplan view of the skin-facing side of the exterior member 2 shown in FIG.8.

In FIG. 7, the first non-adhering region 15 in which the absorbent body7 is not adhered to the exterior member 2 is formed between theplurality of first adhering regions 14 provided side by side in thewidth direction x (hereinafter, the first non-adhering region providedbetween the plurality of first adhering regions may be referred to as a“first central non-adhering region”). In FIGS. 8 and 9, the second frontnon-adhering regions 17F in which the inner sheet 5 and the outer sheet6 are not adhered to each other are formed between the second centralfront adhering regions 16CF provided side by side in the width directionx (hereinafter, the second front non-adhering region provided betweenthe plurality of second central front adhering regions may be referredto as a “second central front non-adhering region”), and the second rearnon-adhering regions 17B in which the inner sheet 5 and the outer sheet6 are not adhered to each other are formed between the second centralrear adhering regions 16CB provided side by side in the width directionx (hereinafter, the second rear non-adhering region provided between theplurality of second central rear adhering regions may be referred to asa “second central rear non-adhering region”). In this case, from theviewpoint of increasing air permeability of the disposable diaper 1, thefirst central non-adhering region 15 is preferably provided so as tooverlap with the second central front non-adhering region 17F, and thefirst central non-adhering region 15 is preferably provided so as tooverlap with the second central rear non-adhering regions 17B. Further,from the viewpoint that the absorbent body 7 is less likely to bedisplaced with respect to the exterior member 2, the first adheringregion 14 is preferably provided so as to overlap with the secondcentral front adhering region 16CF and/or the second central rearadhering region 16CB.

With regard to the relationship with the second adhering region 16 andthe second non-adhering region 17, the rising flap 12 is preferablyprovided as follows. That is, as shown in FIG. 10 in which a partialplan view of the disposable diaper 1 seen from a skin-facing sidethereof is shown, it is preferable that the rising flap 12 has a frontend part 12F, a rear end part 12B and a middle part 12M positionedtherebetween, the flap elastic member 13 extending in the front-reardirection y is provided on the middle part 12M, and the front end part12F and the rear end part 12B are joined to the top sheet 8, whereby themiddle part 12M is formed standable. In FIG. 10, the joint part of therising flap 12 to the top sheet 8 is indicated by cross-hatching. And,it is preferable that a front end of the second middle adhering region16M is located posterior to a rear edge of the front end part 12F of therising flap 12, and/or the rear end of the second middle adhering region16M is located anterior to a front edge of the rear end part 12B of therising flap 12. In FIG. 10, an outline of the second adhering region 16is indicated by a dashed-dotted line. By providing the rising flap 12 inthis manner, the standing height of the rising flap 12 can be increasedat the front and rear ends of the middle part 12M of the rising flap 12.Specifically, as the inner sheet 5 and the outer sheet 6 are separatedfrom each other in the second front non-adhering region 17F and thesecond rear non-adhering region 17B, the standing height of the risingflap 12 can be supplemented. Therefore, the effect of preventing lateralleakage of urine or the like by the rising flap 12 can be enhanced.

It is preferable that a standing base part of the rising flap 12, thatis, a starting point where the rising flap 12 stands up at the middlepart 12M, is located at a position which the second front non-adheringregion 17F and/or the second rear non-adhering region 17B is overlappedwith. As a result, when the rising flap 12 stands up, the inner sheet 5is lifted toward a skin-facing side in the second non-adhering region17, and the height of the standing base part can be raised. Therefore,the effect of preventing lateral leakage of urine or the like can beenhanced.

As an adhesive for forming the first adhering region 14 and the secondadhering region 16, it is convenient to use a hot-melt adhesive inmanufacturing. As the hot-melt adhesive, for example, rubber adhesivessuch as natural rubber, butyl rubber and polyisoprene; styreneelastomers such as styrene-isoprene-styrene block copolymer (SIS),styrene-butadiene-styrene block copolymer (SBS),styrene-ethylene-butadiene-styrene block copolymer (SEBS) andstyrene-ethylene-propylene-styrene block copolymer (SEPS) are preferablyused as a base polymer. Further, the base polymer may be blended withethylene-vinyl acetate copolymer (EVA); polyester; acrylic elastomer;polyolefin elastomer or the like to adjust the adhesiveness or fluidity.It is also preferable to use an amorphous polyalphaolefin (APAO) such asethylene-propylene copolymer as a kind of polyolefin elastomer.

For each adhering region, the adhesive may be applied to the entireregion thereof, or may be applied in a net pattern, a linear pattern, ora scattered spot pattern. As a method of applying the adhesive, forexample, a curtain spray method, an omega coating method, a spiralcoating method, a pattern coating method or the like can be used.

The adhesive forming the first adhering region 14 and the adhesiveforming the second adhering region 16 may be the same or different fromeach other. Further, the adhesive forming the second front adheringregion 16F, the adhesive forming the second middle adhering region 16Mand the adhesive forming the second rear adhering region 16B may be thesame or different from each other. From the viewpoint of improvingwearing feeling of the disposable diaper 1, it is preferable that theexterior member 2 is formed softly at the crotch part R, and from such aviewpoint, it is preferable that the second front adhering region 16Fand/or the second rear adhering region 16B has higher bending resistancethan the second middle adhering region 16M. Therefore, it is preferablethat the amount of adhesive applied per unit area in the second middleadhering region 16M is smaller than the amount of adhesive applied perunit area in the second front adhering region 16F and/or the amount ofadhesive applied per unit area in the second rear adhering region 16B.Or, as the adhesive forming the second intermediate adhesive region 16M,it is preferable to use an adhesive having a lower cohesive force thanthe adhesive forming the second front adhesive region 16F and/or theadhesive forming the second rear adhering region 16B.

This application claims priority to Japanese Patent Application No.2018-193234, filed on Oct. 12, 2018. All of the contents of the JapanesePatent Application No. 2018-193234, filed on Oct. 12, 2018, areincorporated by reference herein.

REFERENCE SIGNS LIST

-   -   1: a disposable diaper    -   2: an exterior member    -   3: a waist opening    -   4: a leg opening    -   5: an inner sheet    -   6: an outer sheet    -   7: an absorbent body    -   8: a top sheet    -   9: a back sheet    -   10: an absorber    -   11: a side joint part    -   12: a rising flap    -   13: a flap elastic member    -   14: a first adhering region    -   15: a first non-adhering region (including a first side        non-adhering region and a first central non-adhering region)    -   16: a second adhering region, 16F: a second front adhering        region, 16RF: a second right front adhering region, 16CF: a        second central front adhering region, 16LF: a second left front        adhering region, 16M: a second middle adhering region, 16B: a        second rear adhering region, 16RB: a second right rear adhering        region, 16CB: a second central rear adhering region, 16LB: a        second left rear adhering region    -   17: a second non-adhering region, 17F: a second front        non-adhering region (including a second central front        non-adhering region), 17B: a second rear non-adhering region        (including a second central rear non-adhering region)    -   20: a body elastic member    -   21: a waist elastic member    -   22: a leg elastic member, 22F: a front leg elastic member, 22B:        a rear leg elastic member    -   P: a front body part    -   Q: a rear body part    -   R: a crotch part

1. A disposable diaper comprising: an exterior member that has a frontbody part, a rear body part and a crotch part positioned therebetweenand is formed into a pants shape having a waist opening and a pair ofleg openings by joining the front body part and the rear body part; andan absorbent body that is provided at least on the crotch part of theexterior member and includes a top sheet, a back sheet and an absorberprovided therebetween; wherein: the exterior member includes an innersheet and an outer sheet; a front leg elastic member extending acrossthe crotch part and along a front side of an edge of the leg opening anda rear leg elastic member extending across the crotch part and along arear side of the edge of the leg opening are provided between the innersheet and the outer sheet; the absorbent body is adhered to askin-facing side of the exterior member at a first adhering region; theinner sheet and the outer sheet are adhered to each other at a secondadhering region, the second adhering region includes a second middleadhering region provided at the crotch part, a second front adheringregion located anterior to the second middle adhering region and asecond rear adhering region located posterior to the second middleadhering region, and the front leg elastic member and the rear legelastic member are disposed so as to extend across the crotch part inthe second middle adhering region; the second middle adhering region isprovided so that at least a part thereof overlaps with the firstadhering region and is provided continuously from one side edge to theother side edge of the absorbent body in the width direction; and thesecond front adhering region is provided so as to satisfy the followingrequirement A and/or the second rear adhering region is provided so asto satisfy the following requirement B. (Requirement A) The second frontadhering region includes a second right front adhering region providedon one side in the width direction so as not to overlap with the firstadhering region, a second left front adhering region provided on theother side in the width direction so as not to overlap with the firstadhering region, and a second central front adhering region providedtherebetween so as to overlap with the first adhering region; and secondfront non-adhering regions in which the inner sheet and the outer sheetare not adhered to each other are formed between the second right frontadhering region and the second central front adhering region and betweenthe second left front adhering region and the second central frontadhering region so as to overlap with the absorbent body. (RequirementB) The second rear adhering region includes a second right rear adheringregion provided on one side in the width direction so as not to overlapwith the first adhering region, a second left rear adhering regionprovided on the other side in the width direction so as not to overlapwith the first adhering region, and a second central rear adheringregion provided therebetween so as to overlap with the first adheringregion; and second rear non-adhering regions in which the inner sheetand the outer sheet are not adhered to each other are formed between thesecond right rear adhering region and the second central rear adheringregion and between the second left rear adhering region and the secondcentral rear adhering region so as to overlap with the absorbent body.2. The disposable diaper according to claim 1, wherein the front legelastic member and the rear leg elastic member extend intermittentlyacross the crotch part in the second middle adhering region.
 3. Thedisposable diaper according to claim 1, wherein the second central frontadhering region is provided so as to extend forward of a front end ofthe absorbent body, and/or the second central rear adhering region isprovided so as to extend rearward of a rear end of the absorbent body.4. The disposable diaper according to claim 1, wherein the second rightfront adhering region is provided so as to extend outward in the widthdirection from one side edge, with respect to the width direction, ofthe absorbent body, and the second left front adhering region isprovided so as to extend outward in the width direction from the otherside edge, with respect to the width direction, of the absorbent body,and/or the second right rear adhering region is provided so as to extendoutward in the width direction from one side edge, with respect to thewidth direction, of the absorbent body, and the second left rearadhering region is provided so as to extend outward in the widthdirection from the other side edge, with respect to the width direction,of the absorbent body.
 5. The disposable diaper according to claim 1,wherein the second right front adhering region and the second left frontadhering region are provided so as to overlap with the front leg elasticmember and extend forward of the front leg elastic member, and/or thesecond right rear adhering region and the second left rear adheringregion are provided so as to overlap with the rear leg elastic memberand extend rearward of the rear leg elastic member.
 6. The disposablediaper according to claim 1, wherein the second middle adhering regionis provided so as to extend outward in the width direction from the oneside edge and the other side edge, with respect to the width direction,of the absorbent body to an outer edge of the exterior member.
 7. Thedisposable diaper according to claim 1, wherein a body elastic memberextending in the width direction is provided between the inner sheet andthe outer sheet on the front body part and the rear body part, and thesecond front adhering region and/or the second rear adhering region isprovided apart from the body elastic member, whereby a non-adheringregion in which the inner sheet and the outer sheet are not adhered toeach other is formed between the second front adhering region and thebody elastic member and/or between the second rear adhering region andthe body elastic member.
 8. The disposable diaper according to claim 1,wherein a value of W_(A2)/W_(A1) is 0.20 or more and 0.65 or less,provided that a length from one side edge to the other side edge, withrespect to the width direction, of the first adhering region is W_(A1)and a length of the second front non-adhering region in the widthdirection in a range from the one side edge to the other side edge, withrespect to the width direction, of the first adhering region is W_(A2),and/or a value of W_(B2)/W_(B1) is 0.20 or more and 0.65 or less,provided that a length from one side edge to the other side edge, withrespect to the width direction, of the first adhering region is W_(B1)and a length of the second rear non-adhering region in the widthdirection in a range from the one side edge to the other side edge, withrespect to the width direction, of the first adhering region is W_(B2).9. The disposable diaper according to claim 1, wherein a length of thesecond front non-adhering region in the width direction is longer than alength of the second rear non-adhering region in the width direction.10. The disposable diaper according to claim 1, wherein the second frontadhering region and/or the second rear adhering region has higherbending resistance than the second middle adhering region.
 11. Thedisposable diaper according to claim 1, wherein a first sidenon-adhering region in which the absorbent body is not adhered to theexterior member is provided on an outer side in the width direction ofthe first adhering region so as to overlap with one side edge or theother side edge, with respect to the width direction, of the absorbentbody, and the first side non-adhering region is provided so as tooverlap with the second front non-adhering region and/or the second rearnon-adhering region.
 12. The disposable diaper according to claim 1,wherein the plurality of first adhering regions are provided side byside in the width direction, whereby a first central non-adhering regionin which the absorbent body is not adhered to the exterior member isformed between the plurality of first adhering regions, the plurality ofsecond central front adhering regions are provided side by side in thewidth direction, whereby a second central front non-adhering region inwhich the inner sheet and the outer sheet are not adhered to each otheris formed between the plurality of the second central front adheringregions, and/or the plurality of second central rear adhering regionsare provided side by side in the width direction, whereby a secondcentral rear non-adhering region in which the inner sheet and the outersheet are not adhered to each other is formed between the plurality ofthe second central rear adhering regions, and the first centralnon-adhering region is provided so as to overlap with the second centralfront non-adhering region and/or the second central rear non-adheringregion.
 13. The disposable diaper according to claim 1, wherein theabsorbent body is provided with rising flaps on both sides in the widthdirection, the rising flap has a front end part, a rear end part and amiddle part positioned therebetween, a flap elastic member extending inthe front-rear direction is provided on the middle part, and the frontend part and the rear end part are joined to the top sheet, whereby themiddle part is formed standable, and a front end of the second middleadhering region is located posterior to a rear edge of the front endpart of the rising flap, and/or a rear end of the second middle adheringregion is located anterior to a front edge of the rear end part of therising flap.
 14. The disposable diaper according to claim 1, wherein theabsorbent body is provided with rising flaps on both sides in the widthdirection, and a standing base part of the rising flap is located at aposition which the second front non-adhering region and/or the secondrear non-adhering region is overlapped with.
 15. The disposable diaperaccording to claim 1, wherein the second front adhering region and/orthe second rear adhering region is provided apart from the second middleadhering region in a front-rear direction.
 16. The disposable diaperaccording to claim 1, wherein the exterior member is formed into a pantsshape by joining the front body part and the rear body part at sidejoint parts on both sides in the width direction, the second right frontadhering region is provided so as to extend outward in the widthdirection from one side edge, with respect to the width direction, ofthe absorbent body to a region within 10 mm inward from the side jointpart of the exterior member, and the second left front adhering regionis provided so as to extend outward in the width direction from theother side edge, with respect to the width direction, of the absorbentbody to a region within 10 mm inward from the side joint part of theexterior member, and/or the second right rear adhering region isprovided so as to extend outward in the width direction from one sideedge, with respect to the width direction, of the absorbent body to aregion within 10 mm inward from the side joint part of the exteriormember, and the second left rear adhering region is provided so as toextend outward in the width direction from the other side edge, withrespect to the width direction, of the absorbent body to a region within10 mm inward from the side joint part of the exterior member.